Introduction
Studying Physics involves discovering, theorizing, analyzing, proving and validating the mathematical laws (and the conditions under which the laws are applicable) that are followed any object in the universe.
Learning and understanding almost anything in Physics is hard. Following are some of the reasons:

Understanding any concept requires atleast a working knowledge of many disciplines of mathematics (for eg. algebra, trigonometry,vectors, matrices, calculus,complex numbers etc.)

Many concepts can be explained by using more than one of the many possible combinations of Mathematical disciplines.

Different mathematical symbols may be used by different sources to represent the same physical object, concept and/or phenomenon.

Given any concept or formula, most sources do not explain exhaustively the conditions under which the concept or formula is applicable.
Study of Physics can be classified into following major disciplines.

Mechanics (Classical and Relativistic): This involves study of Kinematics, Dynamics (Kinetics) and Acoustics of macroscopic physical entities and machines.
 Kinematics: Study of position, form, orientation and motion of any physical entity without considering concepts of mass,forces, energy, work, power etc.
 Dynamics (or Kinetics): Study of position, form, orientation and motion of any physical entity while considering concepts of mass, forces, energy, work, power etc. The forces that we generally consider are mechanical and gravitational forces.
 Acoustics: Study of mechanical waves.
 Simple and Complex Machines
 Thermodynamics
 Electricity and Magnetism
 Optics: Study of the behavior and properties of visible, ultravoilet, and infrared light, including their interactions with matter.
 Quantum Physics: Study of atomic and subatomic particles and forces.
Any other topic in physics is a derivative of one or more of the above mentioned disciplines